Get more of the tests to pass on Windows

autoload/ale/gradle.vim

@@ -2,20 +2,30 @@
 " Description: Functions for working with Gradle projects.
 
 let s:script_path = fnamemodify(resolve(expand('<sfile>:p')), ':h')
+let s:init_path = has('win32')
+\   ? s:script_path . '\gradle\init.gradle'
+\   : s:script_path . '/gradle/init.gradle'
+
+function! ale#gradle#GetInitPath() abort
+    return s:init_path
+endfunction
 
 " Given a buffer number, find a Gradle project root.
 function! ale#gradle#FindProjectRoot(buffer) abort
     let l:gradlew_path = ale#path#FindNearestFile(a:buffer, 'gradlew')
+
     if !empty(l:gradlew_path)
         return fnamemodify(l:gradlew_path, ':h')
     endif
 
     let l:settings_path = ale#path#FindNearestFile(a:buffer, 'settings.gradle')
+
     if !empty(l:settings_path)
         return fnamemodify(l:settings_path, ':h')
     endif
 
     let l:build_path = ale#path#FindNearestFile(a:buffer, 'build.gradle')
+
     if !empty(l:build_path)
         return fnamemodify(l:build_path, ':h')
     endif
@@ -28,6 +38,7 @@ endfunction
 " command. Returns an empty string if cannot find the executable.
 function! ale#gradle#FindExecutable(buffer) abort
     let l:gradlew_path = ale#path#FindNearestFile(a:buffer, 'gradlew')
+
     if !empty(l:gradlew_path)
         return l:gradlew_path
     endif
@@ -47,7 +58,9 @@ function! ale#gradle#BuildClasspathCommand(buffer) abort
 
     if !empty(l:executable) && !empty(l:project_root)
         return ale#path#CdString(l:project_root)
-        \   . l:executable . ' -I ' . s:script_path . '/gradle/init.gradle -q printClasspath'
+        \   . ale#Escape(l:executable)
+        \   . ' -I ' . ale#Escape(s:init_path)
+        \   . ' -q printClasspath'
     endif
 
     return ''